Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida
Mathematic models have suggested that the accumulation of anthropogenic CO2 in the atmosphere has caused a decreased in oceanic pH, and that the decrease should continue for years to come. A lower pH should affect the photosynthesis of primary producers in the sea, including seaweeds. Carbon stable...
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International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo
2010
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ftunivtokyo:oai:repository.dl.itc.u-tokyo.ac.jp:00040693 2023-05-15T17:51:20+02:00 Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida Carvalho, Matheus Carvalho de 93584 Hayashizaki, Ken-Ichi 93585 Ogawa, Hisao 93586 2010-08-20 application/pdf https://repository.dl.itc.u-tokyo.ac.jp/record/40693/files/CMS340122.pdf eng eng International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo Coastal marine science 1 34 135 139 AA11957899 13493000 https://repository.dl.itc.u-tokyo.ac.jp/record/40693/files/CMS340122.pdf 452 CO2 oceanic acidification seaweeds laboratory experiment 2010 ftunivtokyo 2022-12-23T03:30:11Z Mathematic models have suggested that the accumulation of anthropogenic CO2 in the atmosphere has caused a decreased in oceanic pH, and that the decrease should continue for years to come. A lower pH should affect the photosynthesis of primary producers in the sea, including seaweeds. Carbon stable isotope fractionation in photosynthesis should provide information regarding this possible influence of pH on photosynthesis. Here we show that lower pH may lead to enhanced isotopic fractionation in carbon assimilation in photosynthesis by a brown alga Undaria pinnatifida. This may reflect a shift to CO2 absorption instead of HCO3- absorption, which is consistent with a higher proportion of CO2 relative to HCO3- at lower pH. Since in photosynthesis CO2 should be absorbed with less energy costs than HCO3-, ocean acidification may be favorable to U. pinnatifida and species with similar photosynthetic mechanisms. However, other aspects of the phenomenon must be considered before predictions are made concerning the ecology of these organisms. Proceedings of 4th JSPS-VAST Joint Seminar on 'Coastal Marine Science', Hai Phong, Viet Nam, 26-28 October 2009 Oceanography departmental bulletin paper Other/Unknown Material Ocean acidification The University of Tokyo: UT Repository |
institution |
Open Polar |
collection |
The University of Tokyo: UT Repository |
op_collection_id |
ftunivtokyo |
language |
English |
topic |
452 CO2 oceanic acidification seaweeds laboratory experiment |
spellingShingle |
452 CO2 oceanic acidification seaweeds laboratory experiment Carvalho, Matheus Carvalho de 93584 Hayashizaki, Ken-Ichi 93585 Ogawa, Hisao 93586 Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida |
topic_facet |
452 CO2 oceanic acidification seaweeds laboratory experiment |
description |
Mathematic models have suggested that the accumulation of anthropogenic CO2 in the atmosphere has caused a decreased in oceanic pH, and that the decrease should continue for years to come. A lower pH should affect the photosynthesis of primary producers in the sea, including seaweeds. Carbon stable isotope fractionation in photosynthesis should provide information regarding this possible influence of pH on photosynthesis. Here we show that lower pH may lead to enhanced isotopic fractionation in carbon assimilation in photosynthesis by a brown alga Undaria pinnatifida. This may reflect a shift to CO2 absorption instead of HCO3- absorption, which is consistent with a higher proportion of CO2 relative to HCO3- at lower pH. Since in photosynthesis CO2 should be absorbed with less energy costs than HCO3-, ocean acidification may be favorable to U. pinnatifida and species with similar photosynthetic mechanisms. However, other aspects of the phenomenon must be considered before predictions are made concerning the ecology of these organisms. Proceedings of 4th JSPS-VAST Joint Seminar on 'Coastal Marine Science', Hai Phong, Viet Nam, 26-28 October 2009 Oceanography departmental bulletin paper |
author |
Carvalho, Matheus Carvalho de 93584 Hayashizaki, Ken-Ichi 93585 Ogawa, Hisao 93586 |
author_facet |
Carvalho, Matheus Carvalho de 93584 Hayashizaki, Ken-Ichi 93585 Ogawa, Hisao 93586 |
author_sort |
Carvalho, Matheus Carvalho de |
title |
Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida |
title_short |
Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida |
title_full |
Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida |
title_fullStr |
Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida |
title_full_unstemmed |
Effect of pH on the carbon stable isotope fractionation in photosynthesis by the kelp Undaria pinnatifida |
title_sort |
effect of ph on the carbon stable isotope fractionation in photosynthesis by the kelp undaria pinnatifida |
publisher |
International Coastal Research Center, Atmosphere and Ocean Research Institute, the University of Tokyo |
publishDate |
2010 |
url |
https://repository.dl.itc.u-tokyo.ac.jp/record/40693/files/CMS340122.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Coastal marine science 1 34 135 139 AA11957899 13493000 https://repository.dl.itc.u-tokyo.ac.jp/record/40693/files/CMS340122.pdf |
_version_ |
1766158441788735488 |